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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 964 · 40 questions
TalentJR

The fast method (Shift both): How much makes the second number round? 68 needs 2 to make 70. Add that amount to BOTH numbers. Take away the round number.

NameDateTime takenScore ___ / 40
  1. 1.364 − 68 =
  2. 2.307 − 49 =
  3. 3.279 − 48 =
  4. 4.432 − 66 =
  5. 5.481 − 39 =
  6. 6.421 − 66 =
  7. 7.558 − 38 =
  8. 8.199 − 56 =
  9. 9.367 − 66 =
  10. 10.424 − 39 =
  11. 11.221 − 37 =
  12. 12.361 − 86 =
  13. 13.308 − 87 =
  14. 14.228 − 19 =
  15. 15.524 − 18 =
  16. 16.115 − 69 =
  17. 17.209 − 46 =
  18. 18.236 − 76 =
  19. 19.363 − 47 =
  20. 20.399 − 58 =
  21. 21.297 − 29 =
  22. 22.227 − 26 =
  23. 23.213 − 26 =
  24. 24.104 − 88 =
  25. 25.447 − 79 =
  26. 26.170 − 17 =
  27. 27.92 − 66 =
  28. 28.383 − 99 =
  29. 29.377 − 77 =
  30. 30.445 − 78 =
  31. 31.462 − 19 =
  32. 32.139 − 89 =
  33. 33.203 − 38 =
  34. 34.455 − 18 =
  35. 35.62 − 46 =
  36. 36.135 − 16 =
  37. 37.581 − 67 =
  38. 38.515 − 59 =
  39. 39.522 − 18 =
  40. 40.392 − 58 =

Answer key

  1. 296
  2. 258
  3. 231
  4. 366
  5. 442
  6. 355
  7. 520
  8. 143
  9. 301
  10. 385
  11. 184
  12. 275
  13. 221
  14. 209
  15. 506
  16. 46
  17. 163
  18. 160
  19. 316
  20. 341
  21. 268
  22. 201
  23. 187
  24. 16
  25. 368
  26. 153
  27. 26
  28. 284
  29. 300
  30. 367
  31. 443
  32. 50
  33. 165
  34. 437
  35. 16
  36. 119
  37. 514
  38. 456
  39. 504
  40. 334

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